Class: RedParse::MultiShift

Inherits:
Object
  • Object
show all
Defined in:
lib/redparse/compile.rb,
lib/redparse/compile.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(base, modifiers) ⇒ MultiShift

Returns a new instance of MultiShift.



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# File 'lib/redparse/compile.rb', line 1064

def initialize(base,modifiers)
  @base,@modifiers=base,modifiers
  @map=
    (0...2**(modifiers.size/2)).map{|i| base.dup}
  @map.each_with_index{|state,i| #for each branch to the multishift
    (0...modifiers.size).step(2){|j| #for each predicate in the multishift
      if (i&(1<<j)).non_zero? #if the predicate tests true in this branch
        state.append modifiers[j+1] #add the predicates modifier to the state
      end
    }
    state.sort_substates!
  }
end

Instance Attribute Details

#map ⇒ Object (readonly)

Returns the value of attribute map.



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# File 'lib/redparse/compile.rb', line 1086

def map
  @map
end

#modifiers ⇒ Object (readonly)

Returns the value of attribute modifiers.



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# File 'lib/redparse/compile.rb', line 1086

def modifiers
  @modifiers
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/redparse/compile.rb', line 1103

def == other
  huh
end

#act(x) ⇒ Object 



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# File 'lib/redparse/compile.rb', line 1078

def act(x)
  result=0
  (0...@modifiers.size).step(2){|i|
    result|=(1<<(i/2)) if @modifiers[i]===x
  }
  @map[result]
end

#actions ⇒ Object 



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# File 'lib/redparse/compile.rb', line 1092

def actions
  @map.dup
end

#hash ⇒ Object 



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# File 'lib/redparse/compile.rb', line 1100

def hash
  huh
end

#substates ⇒ Object 



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# File 'lib/redparse/compile.rb', line 1088

def substates
  @map.dup
end

#transition_to_loop?(input) ⇒ Boolean

not used

Returns:

  • (Boolean) 


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# File 'lib/redparse/compile.rb', line 1096

def transition_to_loop? input #not used
  huh
end